CN206074429U - It is a kind of to be based on photonic crystal resonant cavity technology multichannel optoacoustic spectroscopy intensifier - Google Patents
It is a kind of to be based on photonic crystal resonant cavity technology multichannel optoacoustic spectroscopy intensifier Download PDFInfo
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- CN206074429U CN206074429U CN201620764161.2U CN201620764161U CN206074429U CN 206074429 U CN206074429 U CN 206074429U CN 201620764161 U CN201620764161 U CN 201620764161U CN 206074429 U CN206074429 U CN 206074429U
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- photonic crystal
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Abstract
The utility model discloses a kind of be based on photonic crystal resonant cavity technology multichannel optoacoustic spectroscopy intensifier, including：Laser instrument (1), laser transmission fiber (2), optics variable connector (3), photonic crystal resonant cavity (4), signal control and processing unit (6)；Laser instrument (1), laser transmission fiber (2), optics variable connector (3) are sequentially connected；Photonic crystal resonant cavity (4) is one or more, is connected with optics variable connector (3), and signal control is communicated to connect with photonic crystal resonant cavity (4) with processing unit (6).At photonic crystal resonant cavity (4) light inlet equipped with transflector mirror, go out Guang Chu completely reflecting mirror be installed, absorption of the enhancing material to reflected light, overcome, it is ensured that the online complexity multicomponent of photo-acoustic spectrometer is effectively detected.
Description
Technical field
The utility model belongs to field of photoelectric technology, more particularly to a kind of based on photonic crystal resonant cavity technology multichannel light
Acousto-optic composes intensifier.
Background technology
In transformer oil, trace gas detection can be divided into non-spectral analysis method and spectroscopic analysis methods.Non-spectral is analyzed
Method mainly has electrochemical process, chromatography, chemiluminescence etc..Spectra methods need not carry out pre-treatment to analyzing sample；
Other materials or destruction sample are not consumed during analysis；Analysis favorable reproducibility, low cost, therefore suffer from both at home and abroad extensively weight
Depending on good technology development prospect.In spectroscopic analysis methods, absorption spectrometry is a kind of by measuring light radiation decay
And then determine a kind of method of absorbent bulk concentration.It is closely develop rapidly during the last ten years new wherein using near infrared band spectrum
Type detection technique, near-infrared 3-5 mu m wavebands are located at " fingerprint region " of molecule, and many kinds of gas molecules have abundant in this wave band
Characteristic absorpting spectrum.
Traditional absorption spectroscopy techniques are limited due to effective absorption light path of material, and the sensitivity of detection is not high；Intracavity
Spectral absorption technology is placed in air chamber in fiber resonance cavity, greatly increases gas using the round vibration of laser and effectively absorbs light path.
In the qualitative and quantitative analysis for carrying out material, the accurate acquisition of signal is optoacoustic to near-infrared photoacoustic spectroscopy detection means
Key in spectrum analysis, but the concentration of actual field material is low, and not enough, sensitivity is naturally relatively low for photoacoustce signal intensity.So
Detection accuracy not enough, and be often in practice some micro substances be the composition for needing most accurate detection on the contrary.So increasing
Strong photoacoustic spectrum signals, solve the key that low concentration, the measurement of micro substance are optoacoustic spectroscopy device on-line checkings.
The content of the invention
The technical problems to be solved in the utility model is：
A kind of optoacoustic effect when providing online optoacoustic spectroscopy detection compounding substances component strengthens, and realizes that multichannel accurately enters
The qualitative and quantitative analysis of row material.
To solve above-mentioned technical problem, the technical solution of the utility model is：
A kind of photonic crystal resonant cavity technology multichannel optoacoustic spectroscopy intensifier and system of being based on is used to detect multicomponent
The enhancing of admixture of gas photoacoustic spectrum signals.
Described device includes laser instrument (1), laser transmission fiber (2), optics variable connector (3), photonic crystal resonant cavity
(4), signal control and processing unit (6).The laser instrument (1) is broadband near infrared laser, and wavelength is in 780～2526nm
Spectral regions.
The laser instrument (1), the laser transmission fiber (2), the optics variable connector (3) are sequentially connected；The light
Sub- crystal oscillator cavity (4) is one or more, is connected with the optics variable connector (3), and the signal is controlled and processing unit
(6) communicate to connect with the photonic crystal resonant cavity (4).
The photonic crystal resonant cavity (4) is photonic crystal fiber pipe, and the aperture in its fibre cladding constitutes photonic crystal,
Light is limited and is transmitted in wherein hollow, overcome bending loss etc. to strengthen absorption of the determinand to light, so as to obtain fine
Photoacoustic spectrum signals so that optoacoustic spectroscopy detection low concentration material when it is more accurate.Multichannel design simultaneously can be realized
The not Interference Detection of many kinds of substance.
Further, transflector mirror (4-1) is housed at photonic crystal resonant cavity (4) light inlet, is only allowed specific
The light of wavelength passes through, while the light of specific wavelength is concentrated reflecting in the central hollow core of photonic crystal resonant cavity (4).The transflection
Mirror (4-1) is penetrated through coating film treatment.The photonic crystal resonant cavity (4) is going out equipped with completely reflecting mirror (4-2) at light, with light inlet
The transflector mirror (4-1) at place constitutes resonator.
Further, the photonic crystal resonant cavity (4) is equipped with optoacoustic microphone (5) in the middle part of cavity, will pick up signal
The signal control and processing unit (6) are transferred to, various concentration are calculated.
Used as a kind of preferred version of the present utility model, described device includes laser instrument and provides wavelength for spectral detection wider
LASER Light Source, laser instrument excites crystal by laser transmission fiber connection, produces the laser of the wider near infrared band of wavelength；
Used as a kind of preferred version of the present utility model, described device includes the design of optics way switch, is multichannel
Optoacoustic spectroscopy detection provides necessary condition；
Used as a kind of preferred version of the present utility model, the photonic crystal resonant cavity photonic crystal fiber pipe, photon are brilliant
Aperture in body optical fibre optical fibre covering constitutes photonic crystal, when aperture pitch and hole diameter meet certain condition, its photon energy
The propagation of light can be just prevented in the range of gap, light is limited and is transmitted in wherein hollow, overcome bending loss etc. to strengthen determinand
Absorption to light；Photonic crystal resonant cavity (4) is Internal Reflection Photonic Crystal Fiber or index guide structure type photonic crystal light
It is fine.
The beneficial effects of the utility model are：The utility model proposes being based on photonic crystal resonant cavity technology multichannel
Optoacoustic spectroscopy intensifier and system, overcome traditional absorption spectroscopy techniques as effective absorption light path of material is limited, inspection
The not high problem of the sensitivity of survey；Intracavity spectral absorption technology is placed in air chamber in fiber resonance cavity, is come and gone using laser and is shaken
Swing and greatly increase gas and effectively absorb light path, light energy transmits basic free of losses, be also not in postpone etc. to affect data transfer
The phenomenon of rate, and with extremely wide transmission band, can all band transmission.
The enhancing of optoacoustic spectroscopy effect when realizing on-line monitoring multicomponent gas, the certain wave of near infrared laser transmitting
Long laser, transmitting to optics variable connector through laser transmission fiber carries out branch to light, switches in multichannel collecting；Swash
Transflector mirror of the light by the special coating film treatment of photonic crystal resonant cavity, obtains the specific narrow-band just for the detection of a certain material
Light, specific band light are being limited in the central hollow core of photonic crystal resonant cavity, overcome bending loss etc. to strengthen determinand to light
Absorption；The Guang Chu that goes out of photonic crystal resonant cavity is provided with completely reflecting mirror, absorption of the enhancing material to reflected light, so as to overcome
Online optoacoustic spectroscopy when relatively low component materials are detected, the inaccurate impact of the low spectrogram information for causing of sink effect, it is ensured that
The online complexity multicomponent of photo-acoustic spectrometer is effectively detected.
Description of the drawings
Fig. 1 is the utility model device overall structure diagram.
Fig. 2 is the utility model device photonic crystal fiber intra resonant cavity structural representation.
Specific embodiment
Describe preferred embodiment of the present utility model below in conjunction with the accompanying drawings in detail.
Embodiment one
The utility model discloses one kind based on photonic crystal resonant cavity technology multichannel optoacoustic spectroscopy intensifier, new
The enhancing of optoacoustic spectroscopy effect when device can be applicable to monitor multicomponent gas on-line.So as to realize the detection of online optoacoustic spectroscopy compared with
During low component materials, being capable of accurate qualitative and quantitative analysis.
Below in conjunction with preferred embodiment, to specific embodiment, feature and its effect for providing according to the utility model, in detail
Describe in detail it is bright after, for simple clearly purpose, hereafter the appropriate description for eliminating known technology is in order to avoid those are unnecessary thin
Section affects the description to the technical program.
As shown in figure 1, in this example, the spectral regions near infrared laser for choosing wavelength in 780～2526nm is used as sharp
Described in 1 described in light device, more broadband excitation source is provided for follow-up spectral detection, through described in laser transmission fiber described in 2
And control break optical channel described in 3 described in optics variable connector, different photonic crystal resonant cavity institutes is entered after carrying out light splitting
State in described in 4, described in 5 described in the optoacoustic microphone at middle part described in 4 described in photonic crystal resonant cavity, signal transmission will be picked up to letter
Number control with described in 6, calculate various concentration described in processing unit.
Such as Fig. 2, internal structure schematic diagram described in 4 described in above-mentioned photonic crystal resonant cavity is disclosed, filled at its light inlet
There is the light that specific wavelength is only allowed described in 4-1 described in the transflector mirror through coating film treatment to pass through, the light of specific wavelength is concentrated
Reflect in the central hollow core of photonic crystal resonant cavity.Simultaneously go out at light equipped with described in 4-2 described in completely reflecting mirror at which, and enter light
Resonator is constituted described in 4-1 described in speculum at mouthful.Hollow-Core Photonic Crystal Fibers are selected in the utility model, in fibre cladding
Aperture constitute photonic crystal, when aperture pitch and hole diameter meet certain condition, can just prevent in the range of its photonic bandgap
The propagation of light, light are limited in transmission in central hollow core；So as to strengthen the intensity of light absorbing substance in central hollow core, strengthen and absorb
Spectral absorption.
A kind of Enhancement Method of above-mentioned absorption optoacoustic spectroscopy intensifier, methods described include：By the near of laser instrument transmitting
The broadband light of infrared band, it is through laser transmission fiber and optics variable connector control break optical channel, brilliant into photon
In body resonator, at photonic crystal resonant cavity light inlet through special coating film treatment transflector mirror, only allow to carry out a certain thing
The light of quality detection enters cavity, transmits as photonic crystal fiber can be limited in light in central hollow core, strengthens center empty
In-core light absorbing substance it is strong；Photoacoustic spectroscopy is carried out by optoacoustic microphone again, its feature has micro- to distinguish intensity
The signal of little difference, provides good data basis to obtain enhanced absorption optoacoustic spectroscopy spectrogram.
In sum, the utility model proposes based on photonic crystal resonant cavity technology multichannel optoacoustic spectroscopy strengthen fill
Put, the enhancing of optoacoustic spectroscopy effect when realizing on-line monitoring multicomponent gas.By from optics variable connector and special
The transflector mirror of coating film treatment, realizes the effect of multi-channel detection；Simultaneously by the use of photonic crystal fiber as resonant cavity, by light
Limit and transmit in wherein hollow, overcome bending loss etc. to strengthen absorption of the determinand to light, overcome in line absorption optoacoustic light
, when relatively low component materials are detected, spectral absorption effect is weak and the inaccurate impact of Spectral Signal that cause for spectrum.
Here description of the present utility model and application are illustrative, are not wishing to be limited in scope of the present utility model
State in example.The deformation and change of embodiments disclosed herein is all possible, for one of ordinary skill in the art comes
The replacement and equivalent various parts for saying embodiment is known.It should be appreciated by the person skilled in the art that without departing from this
In the case of the spirit and essential characteristics of utility model, the utility model can otherwise, structure, arrangement, ratio, and
Other assemblies, material and part are realizing.In the case of without departing from the utility model scope and spirit, can be to disclosing here
Embodiment carry out other deformation and change.
Claims (8)
1. it is a kind of to be based on photonic crystal resonant cavity technology multichannel optoacoustic spectroscopy intensifier, it is characterised in that to include：Laser instrument
(1), laser transmission fiber (2), optics variable connector (3), photonic crystal resonant cavity (4), signal control and processing unit (6)；
The laser instrument (1), the laser transmission fiber (2), the optics variable connector (3) are sequentially connected；The photon is brilliant
Body resonator (4) is one or more, is connected with the optics variable connector (3), signal control and processing unit (6) with
Photonic crystal resonant cavity (4) communication connection.
2. photonic crystal resonant cavity technology multichannel optoacoustic spectroscopy intensifier is based on according to claim 1, and its feature exists
In：The laser instrument (1) is broadband near infrared laser, spectral regions of the wavelength in 780～2526nm.
3. photonic crystal resonant cavity technology multichannel optoacoustic spectroscopy intensifier is based on according to claim 1, and its feature exists
In：The photonic crystal resonant cavity (4) is photonic crystal fiber pipe, and the aperture in its fibre cladding constitutes photonic crystal, by light
Limit and transmit in wherein hollow, overcome bending loss etc. to strengthen absorption of the determinand to light.
4. photonic crystal resonant cavity technology multichannel optoacoustic spectroscopy intensifier is based on according to claim 3, and its feature exists
In：The photonic crystal resonant cavity (4) is Internal Reflection Photonic Crystal Fiber or index guide structure type photonic crystal fiber.
5. photonic crystal resonant cavity technology multichannel optoacoustic spectroscopy intensifier is based on according to one of Claims 1-4, its
It is characterised by：Transflector mirror (4-1) is housed at photonic crystal resonant cavity (4) light inlet, the light of specific wavelength is only allowed
Pass through, while the light of specific wavelength is concentrated reflecting in the central hollow core of photonic crystal resonant cavity.
6. photonic crystal resonant cavity technology multichannel optoacoustic spectroscopy intensifier is based on according to claim 5, and its feature exists
In：The transflector mirror (4-1) is through coating film treatment.
7. photonic crystal resonant cavity technology multichannel optoacoustic spectroscopy intensifier is based on according to claim 5, and its feature exists
In：The photonic crystal resonant cavity (4) is going out at light equipped with the transflector mirror (4- at completely reflecting mirror (4-2), with light inlet
1) constitute resonator.
8. photonic crystal resonant cavity technology multichannel optoacoustic spectroscopy intensifier is based on according to one of claims 1 to 3, its
It is characterised by：The photonic crystal resonant cavity (4) is equipped with optoacoustic microphone (5) in the middle part of cavity, will pick up signal transmission to institute
State signal control and processing unit (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620764161.2U CN206074429U (en) | 2016-07-19 | 2016-07-19 | It is a kind of to be based on photonic crystal resonant cavity technology multichannel optoacoustic spectroscopy intensifier |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620764161.2U CN206074429U (en) | 2016-07-19 | 2016-07-19 | It is a kind of to be based on photonic crystal resonant cavity technology multichannel optoacoustic spectroscopy intensifier |
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| CN206074429U true CN206074429U (en) | 2017-04-05 |
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| CN201620764161.2U Expired - Fee Related CN206074429U (en) | 2016-07-19 | 2016-07-19 | It is a kind of to be based on photonic crystal resonant cavity technology multichannel optoacoustic spectroscopy intensifier |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108872087A (en) * | 2018-07-10 | 2018-11-23 | 昆山和智电气设备有限公司 | A kind of sound pressure signal channel design |
| CN112504987A (en) * | 2021-02-06 | 2021-03-16 | 湖北鑫英泰系统技术股份有限公司 | Method and system for identifying mixture of gas ethylene and acetylene in transformer oil |
-
2016
- 2016-07-19 CN CN201620764161.2U patent/CN206074429U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108872087A (en) * | 2018-07-10 | 2018-11-23 | 昆山和智电气设备有限公司 | A kind of sound pressure signal channel design |
| CN112504987A (en) * | 2021-02-06 | 2021-03-16 | 湖北鑫英泰系统技术股份有限公司 | Method and system for identifying mixture of gas ethylene and acetylene in transformer oil |
| CN112504987B (en) * | 2021-02-06 | 2021-05-04 | 湖北鑫英泰系统技术股份有限公司 | Method and system for identifying mixture of gas ethylene and acetylene in transformer oil |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170405 Termination date: 20200719 |
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| CF01 | Termination of patent right due to non-payment of annual fee |